It's time for everyone to feel old. There is a chance that
Mary-Kate Olsen -- once the portrayer of baby Michelle Tanner on
"Full House" -- has gotten engaged to
Olivier Sarkozy.

But don't worry too much -- even with a gold band on her left ring finger, there's a good chance that Mary-Kate is still officially single.
Olsen and Sarkozy were spotted in the crowd at a New York Knicks basketball game on Sunday (March 3), happily engaging in some PDA. However, it wasn't the lovey-dovey canoodling that got everyone's attention. It was the gold-colored band clearly seen on Mary-Kate's finger that brings up questions.

There has been no word yet on whether or not this means anything, but this isn't the first time Olsen has sported rumor-inspiring bling. The
Huffington Post reports that a similar incident happened in Paris in January, when Olsen was seen with a ring shortly after a trip to the jewelry store with her beau. In that case, a rep for the young woman confirmed that there was no story.

The relationship between Sarkozy, a 43-year-old French banker (and the half-brother of a former French President), and the 26-year-old Olsen first became public in 2012, when -- at another New York Knicks game -- the pair were seen expressing open affection.

Now a designer, Mary-Kate Olsen and her twin sister,
Ashley Olsen, first became famous in the shared role of baby Michelle on the sitcom, "Full House." Later, the girls co-starred in a series of film and television roles, making them two of the biggest child stars ever.